单项选择题
A. I think so. B. Don’t mention it. C. Please take it easy. D. What’s the matter E. And you F. I’d love to. G. But he panned to. H. Me, too.
A.care for children. B.express herself. C.travel alone. D.use her physical strengt
A.Fly ash. B.The construction of dams, bricks, and roads. C.Extracting aluminum, silicon, and magnetic from ash. D.The available technology.